The Use of Specific Non-<i>Saccharomyces</i> Yeasts as Sustainable Biocontrol Solutions Against <i>Botrytis cinerea</i> on Apples and Strawberries

Apples and strawberries hold significant commercial and nutritional value but face pre- and post-harvest spoilage due to infections by <i>Botrytis cinerea.</i> While spoilage is conventionally managed using synthetic chemicals, there is a growing interest in utilising yeasts as biologica...

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Main Authors: Zukisani Gomomo, Morris Fanadzo, Maxwell Mewa-Ngongang, Boredi Silas Chidi, Justin Wallace Hoff, Marieta van der Rijst, Lucky Mokwena, Mathabatha Evodia Setati, Heinrich Wilbur du Plessis
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Journal of Fungi
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Online Access:https://www.mdpi.com/2309-608X/11/1/26
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Summary:Apples and strawberries hold significant commercial and nutritional value but face pre- and post-harvest spoilage due to infections by <i>Botrytis cinerea.</i> While spoilage is conventionally managed using synthetic chemicals, there is a growing interest in utilising yeasts as biological control agents. This study aimed to assess the antifungal potential of non-<i>Saccharomyces</i> yeasts <i>Suhomyces pyralidae, Meyerozyma guilliermondii, Pichia kluyveri</i>, <i>Zygoascus hellenicus</i>, and <i>Aureobasidium melanogenum</i> against three <i>B. cinerea</i> strains (B05.10, IWBT-FF1, and PPRI 30807) on agar plates and in post-harvest trials on apples and strawberries. <i>Aureobasidium melanogenum</i> exhibited a broad range of extracellular enzyme production and inhibition rates of 55%, 52%, and 40% against the strains. In volatile organic compound (VOC) assays, <i>P. kluyveri</i> and <i>S. pyralidae</i> achieved 79% and 56% inhibition, respectively, with VOCs like isobutanol, isoamyl alcohol, 2-phenylethanol, isoamyl acetate, and 2-phenethyl acetate identified. In post-harvest trials, <i>S. pyralidae</i> was most effective on apples, with inhibition rates up to of 64%. The commercial fungicide Captan and <i>S. pyralidae</i> and <i>P. kluyveri</i> achieved 100% inhibition against the <i>B. cinerea</i> strains B05.10 and IWBT-FF1 on strawberries. These findings highlight the potential of the selected yeast species as biological control agents against <i>B. cinerea</i>, warranting further research into their application in commercial fruit protection.
ISSN:2309-608X